Joist and rafter jack



p 9, 1930- w. s. KIRKPATRICK I 1,775,465

J IsT AND RAFTER JACK Filjd Sept. 12, 1929 Patented F Pt- 1930 l j l l l r L UNITED STATES PATENT OFFICE a l wI nIAM s. irinxrarnrcnor nEaenoLz, l i l mm Ann Meme JACK Application filed September12, 1929. Serial 1 10. 392,115.

The invention relates toa device to be used shown in the form selected I for illustration for straightening crooked joists or rafters disclosing the members 3 andA made of i when laying the flooring or roofing boards, straps ofiron or steeland having thetermiand has for its object the provision of a jack nals on which the hook members 7 are formed ,5 adapted to straddle adjacent joists or rafters vgiven a half turnas shown at 8. l j 55 to straighten them while the flooring or roof- In operatiomit will be apparent that when ing is being attached thereto and consists of it is necessary to straighten crooked joists or a lever member and pulling members pivotrafters whenlaying flooring boardsor roofally secured thereto having openends to ening boards, the jack is engaged with the 10 gage over adjacent joists or rafters, one of joist or rafter requiring straightening andeo the pulling members being elongatedto rest the adjacent joist or rafter is in the position upon the adjacent joists or rafters to hold the shown in Figure 1, and then by swinging the jack properly positioned, the lever member lever memberltoreduce the distance between and pullingmembers being providedwith a the hook members 7, it will be apparent that series of openings to receive thepivot pin the crookedjoist or rafter will be straightened 65 and sliding means by which the device may to hold it while the flooring boards or roofing be adjusted for joists and rafters spaced at boards are securedthereto. varying intervals, and also toadjust the pull 7 What is claimed is -of the lever to suit the conditions under 1. A joist and rafter jack, comprisinga 2- which the tool used. v lever member and pulling memberspivot- 10 The invention will be described in detail ally engaging thelever member and provided hereinafter and will be found illustrated in with hooked ends to engage adjacentjoists the accompanying drawings in which or rafters, one of said pulling members being Figure 1 is a top plan view of the improved extended beyond the pivoted portion to pro joist or rafter ack showing and jack resting vide an extended member to support the meml on adjacent joists or rafters shown in broken bers onthe joists or rafters. r l lines and fragmentarily, 2. A joist and rafter jack, comprising a Figure 2 is a side View in elevation, and lever member, pulling members, said lever Figure 3 is a transverse sectional view on member and pullingmembers havingseries 30 a plane indicated by the line 3 -8 of Figure 1. of openings therein, pivot pins engaging In the drawings similar reference charthrough selected openings in said members acters are used to designate correspondi g and pivoting said pulling members on said parts throughout the several views. lever member, one of said pulling members The improved joist or rafter jack includes being of a length to rest upon adjacent oists 35 a level member 1 provided With a Serie Of or rafters to support the members thereon;

openings 2 in one of its ends, and pulling In testimony whereof I affix my signature. members3 and 4 suitably secured to the lever WILLIAM S. KIRKPATRICK. member 1 by means of pivot means 5 engag: i ing through selected openings 2 in the lever j I j a memberl, and selected openings 6 in the pulla j ing members 3 and 4, said'members 3 and 4 each having a series'of openings 6. The member 3 is elongated, and has the openings 6 arranged substantially midway of its length V l 5 so that said member 3 rests upon and is sup- I ported by the joists or rafters A when the device is in position for operation, and each of the members 3 and 4 have downturned hook members 7 to engage on the remote sides a of the joists or rafters A, the construction l l L00 

